R-134A Refrigerant Pressure Temperature Chart - R-134A is an inert gas also known as Tetrafluoroethane and is used in air conditioner systems. R134A is used as a chemical refrigerant in automotive and domestic use air conditioners such as chilled water systems in both commercial markets and industrial markets. You are very familiar with R134A if you are either an automotive mechanic or a chiller mechanic. R-134A uses the names Tetrafluoroethane, Genetron, or Puron among other names depending on the manufacturer. The pressure temperature chart represents the average pressure-temperature relationship of refrigerant R-134A.
R-134A Refrigerant Pressure Temperature Chart
|PSIG||R-134A Temperature||PSIG||R-134A Temperature|
This table represents a pressure-temperature chart for R134A which is a refrigerant frequently used in automobile air conditioning and for larger chilled water systems in commercial and industrial chilled water systems. R-134A is an HFC or hydrofluorocarbon refrigerant and as noted is used for automotive air conditioning where it replaced the CFC refrigerant R-12. Always follow manufacturers charging instructions when charging any chiller or auto air conditioner system with R-134A.
Whether purchasing R134A for HVAC or Automotive use a license is required under EPA Clean Air Act regulations. R-134A was introduced in the 90’s as a replacement for R-12 which was banned from manufacture and use by the Clean Air Act in the 90’s. Because R-134A is considered to have GWP or Global Warming Potential it is required to be recovered from HVAC Systems rather than released into the atmosphere.
Refrigerant Leaks and Corrective Action (Via the EPA Website) - R-134A Refrigerant Pressure Temperature Chart
The leak repair requirements, promulgated under Section 608 of the Clean Air Act, require that when an owner or operator of an appliance that normally contains a refrigerant charge of more than 50 pounds discovers that refrigerant is leaking at a rate that would exceed the applicable trigger rate during a 12-month period, the owner or operator must take corrective action.
Trigger Rates – R-134A Refrigerant Pressure Temperature Chart
For all appliances that have a refrigerant charge of more than 50 pounds, the following leak rates for a 12-month period are applicable:
|Appliance Type||Trigger Leak Rate|
|Industrial process refrigeration||35%|
|All other appliances||15%|
In general, owners or operators must either repair leaks within thirty days from the date the leak was discovered, or develop a dated retrofit/retirement plan within thirty days and complete actions under that plan within one year from the plan’s date. However, for industrial process refrigeration equipment and some federally-owned chillers, additional time may be available.
An additional resource for R134A Refrigerant Pressure Temperature Chart can be found here.